🇺🇸 Laredo vs 🇺🇸 San Francisco

Laredo on the Rio Grande at the Mexican border is one of America's hottest cities, regularly posting the nation's highest temperature records in summer. The Chihuahuan Desert meets the Tamaulipan shrubland here with virtually no moisture from any direction — summers can see 50 consecutive days above 100°F.

San Francisco's climate is shaped by its position on a peninsula surrounded by the Pacific Ocean and San Francisco Bay. The coastal fog (Karl the Fog) rolls in through the Golden Gate each summer afternoon, keeping temperatures mild year-round. The city has dramatically different microclimates — the Sunset District fog-bound while the Mission basks in sun on the same day.